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#!/bin/sh
# Ensure sort -g sorts floating point limits correctly
# Copyright (C) 2010-2025 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
print_ver_ sort
# Return 0 if LDBL_MIN is smaller than DBL_MIN, else 1.
# Dissect numbers like these, comparing first exponent, then
# whole part of mantissa, then fraction, until finding enough
# of a difference to determine the relative order of the numbers.
# These are "reversed":
# $ ./getlimits |grep DBL_MIN
# DBL_MIN=2.225074e-308
# LDBL_MIN=2.004168e-292
#
# These are in the expected order:
# $ ./getlimits|grep DBL_MIN
# DBL_MIN=2.225074e-308
# LDBL_MIN=3.362103e-4932
dbl_minima_order()
{
LC_ALL=C getlimits_
set -- $(echo $LDBL_MIN | tr .e- ' ')
local ldbl_whole=$1 ldbl_frac=$2 ldbl_exp=$3
set -- $(echo $DBL_MIN |tr .e- ' ')
local dbl_whole=$1 dbl_frac=$2 dbl_exp=$3
test "$dbl_exp" -lt "$ldbl_exp" && return 0
test "$ldbl_exp" -lt "$dbl_exp" && return 1
test "$ldbl_whole" -lt "$dbl_whole" && return 0
test "$dbl_whole" -lt "$ldbl_whole" && return 1
test "$ldbl_frac" -le "$dbl_frac" && return 0
return 1
}
# On some systems, DBL_MIN < LDBL_MIN. Detect that.
dbl_minima_order; reversed=$?
for LOC in C $LOCALE_FR; do
LC_ALL=$LOC getlimits_
# If DBL_MIN happens to be smaller than LDBL_MIN, swap them,
# so that out expected output is sorted.
if test $reversed = 1; then
t=$LDBL_MIN
LDBL_MIN=$DBL_MIN
DBL_MIN=$t
fi
printf -- "\
-$LDBL_MAX
-$DBL_MAX
-$FLT_MAX
-$FLT_MIN
-$DBL_MIN
-$LDBL_MIN
0
$LDBL_MIN
$DBL_MIN
$FLT_MIN
$FLT_MAX
$DBL_MAX
$LDBL_MAX
" |
grep '^[0-9.,e+-]*$' > exp # restrict to numeric just in case
tac exp | LC_ALL=$LOC sort -sg > out || fail=1
compare exp out || fail=1
done
Exit $fail
|
